Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '077bfe1f757fc1412ce07479f33b0a559e3207ab97d1325f47da56bad8dee6e4' 
  AND token = 'eDW8Ugad4ieDnu550Z3dpQC6HE+xqBfhA6IJUl2avew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}